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From:   Sasha Levin <sashal@kernel.org>
To:     linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc:     Kees Cook <keescook@chromium.org>,
        "David S . Miller" <davem@davemloft.net>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.10 047/101] sh_eth: Avoid memcpy() over-reading of ETH_SS_STATS
Date:   Mon, 28 Jun 2021 10:25:13 -0400
Message-Id: <20210628142607.32218-48-sashal@kernel.org>
In-Reply-To: <20210628142607.32218-1-sashal@kernel.org>
References: <20210628142607.32218-1-sashal@kernel.org>
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From: Kees Cook <keescook@chromium.org>

[ Upstream commit 224004fbb033600715dbd626bceec10bfd9c58bc ]

In preparation for FORTIFY_SOURCE performing compile-time and run-time
field bounds checking for memcpy(), memmove(), and memset(), avoid
intentionally reading across neighboring array fields.

The memcpy() is copying the entire structure, not just the first array.
Adjust the source argument so the compiler can do appropriate bounds
checking.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/net/ethernet/renesas/sh_eth.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/renesas/sh_eth.c b/drivers/net/ethernet/renesas/sh_eth.c
index 6d84266c03ca..5cab2d3c0023 100644
--- a/drivers/net/ethernet/renesas/sh_eth.c
+++ b/drivers/net/ethernet/renesas/sh_eth.c
@@ -2287,7 +2287,7 @@ static void sh_eth_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
 {
 	switch (stringset) {
 	case ETH_SS_STATS:
-		memcpy(data, *sh_eth_gstrings_stats,
+		memcpy(data, sh_eth_gstrings_stats,
 		       sizeof(sh_eth_gstrings_stats));
 		break;
 	}
-- 
2.30.2